static PTElement ai_parseToCulledTree(S input) {
  ret ai_parseToCulledTree(input, new AI_BottomUpParser1);
}

static PTElement ai_parseToCulledTree(S input, AI_BottomUpParser1 parser) {
  ret ai_cullParseTree(ai_parseToTreeWithCurlyPhrases(input, parser));
}